OK, lots of questions/answers.....

OK, I've been feeding a medium or small rat (depending on availability) from the same store. When he ate last (3 weeks), it was a small rat, but about a week before that, it was a medium rat. So when he didn't eat last week, it made sense. He was probably still full.

But this week, he's really doing the hungry routine. I didn't notice any freezer burn, but I"m not sure how to tell.

Not quite ready to try live food (that will be a last last last resort). I adopted Dex because he was already accustomed to frozen/thawed food.

WHen he doesn't eat, I always throw it away.

OK, now a question. As I noted, I cross posted on the Bellydancing/Snake Lovers tribe. Someone there is experiencing a similar thing with a boa. Her boa is now 3 years old and she suggested it might have to do with becoming an adult??? Dex is three years old (approx.). I've had him almost a year. He eats like clockwork. Could his age be a factor? He's full grown now and doesn't need to eat as often?

BTW, Dex is approximately 4 feet now......which, for a male Ball, is about complete. He might grow another foot.....but not necessarily.

Thank you for all the ideas and information you've provided so far. It is greatly appreciated.